Electric welding apparatus.



J. P. NlKONOW.

ELECTRIC WELDING APPARATUS.,

APPLlcATloN FILED ocT. 5. w17* 1 ,280, 818 Patented Oat. 8, 1918.

WITNEssEs 1' INVENTOR JOHN?. NIXONOW, F BALTIMORE, MARYLAND.

ELECTRIC WELDING APPARATUS. n

Speoineation of Letters Patent.

Patented oct. s, 191s.

application mea omber s, 1911. serial 110.194.954.

To all whom it may concern.' l

Be it known that I, JOHN P. NmoNow, a

Y citizen of Russia and a resident of the city of Baltimore, in the State of Maryland, have invented a new and useful Improvementl 1n Electric Welding Apparatus, of which the following is a specification.

My invention relates to the electric welding apparatus and it has particular reference to such mechanism as embody manually controlled ortable electrodes.

The object of my invention is to provide a simple and convenient arrangement, whereapparatus, and ig.

by the electrodes of a portable apparatus can be manipulated with one hand, closing electric current in one spot on two or more metal sheets and exerting suitable pressure in this spot to produce the desired welding action.

In the construction of contact or spot welding apparatus difficulties have been encountered because of lack of convenient arrangement l whereby an electric welding could be done on a stationary pieceyof work or one that is -too large or too ulky to handle in the ordinary or stationary spot welding apparatus.

According to my invention, I employ an electric spot welding apparatus, comprising two electrodes, movably attached to the parts of a portable and manually operated frame, so that theapparatus can be held in one hand in a proper relation to the piece to be welded and at the same time, the electrodes canbe, brought together by the movement of the fingers and thereby the contact from electric current through the piece be closed and the necessary welding heat and pressure produced.

lIn the accompanying drawings, Figure 1 represents a lon tudnal section through my 2, modification of same.

Electrode 1 is fastened to the metal frame 2 with a handle 3, to the end of which, a flexible lead is attached. Electrode 5 is attached to the sliding member 6, at the other end of which slot 7 is provided for actuating this member by means of a trigger or lever 8. The lever 8 moves on a fulcrum 9, attached to the frame 10, connected to a flexible lead 11. Flexible conductor 12 insures proper electrical connection between lead 11, frame 10, member 6, and electrode 5.

Insulation 13 separates movable member 6 from the frame 2. Insulation 14 separates frames 2 and 10, and insulation 15 on the handle and 16 on the lever protect the operators hand from drectvconta'ct with the electric circuit. l

Spring 17 tends to keep the electrodes apart, and the action of the hand (its grip on the handle and lever) brings the electrodes together with a considerable pressure,

dependin on the ratio of the lever arms.

A suita le transformer (not shown) may be introduced between the leads and oldinary electric circuit in order to obtain proper low voltage and high current capacity.

Fig. 2 represents a modification, in which the positions of the handle and the lever are transposed. The lever 8 is arranged to act as a trigger especially adapted .to be o erated by the fingers of the hand, hol ing handle 15. Spring 17 is located between the ends'of the sliding members, and the outside tube 2 is made to slide over insulation 13 and frame 6. The fulcrum 9 is attached to the sliding tube, and the lever 8 bears on the projection on the handle with a correspondlng depression, thus forming a pivoting polnt. g

An important advantage of the mechanism above described is, that it can be easily manipulated, carried and controlled with one hand, so that the welding can be done on the pieces without disturbing their position or removing them from their place.

I claim as my invention:

1. Inan electric welding apparatus, the combination with the portable frame, a removable electrode, supported by said frame, a sliding member in coperation with said portable frame, a removable electrode, supported by said sliding member, a handle, mtegrally connected with said' frame, means within said handle to conduct the electric current to both of said electrodes, and means to move said sliding member, said means being in a working relation with said handle.

2. In an electric welding apparatus, the combination with the portable frame, consistin of an insulated rod, supporting a remova le electrodeon one end and a handle on the other, a sliding member, supported by said insulated rod, al removable electrode, supported by said sliding member, means within said handle to conduct the electric current to both of said removable electrodes, and means to move said sliding member, said means consistin of a lever in a working relation with sald handle.

10 trodes, and means to move said sliding member, said means consistin of a. lever in a working relation with sai handle.

In testimony whereof, I have hereunto subscribed my name this fourth day of October 1917.

JOHN -P. NIKONOW.

Witnesses:

H. J. Lmxm, MAX M. Gmnsxr. 

